Demetalization Process for Metalized Substrates

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Solution Overview

Problem

Existing methods for producing images on metalized film substrates face issues with 'creep' of caustic fluids in fine lines and non-removable coatings that cause delamination problems, especially when packaging materials like food or fragrances are involved.

Innovation Solution

A method involving selective application of a protective UV epoxy-based ink, followed by demetalizing with a caustic solution, rinsing, drying, and applying an adhesive coating, which can be removed along with the protective ink, allowing for precise image creation without residual coatings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If caustic fluid is printed onto the substrate to erode the metal, then the image is formed, but the caustic fluid creeps and erodes fine lines before rinsing can begin

Engineering Contradiction:

Improveimage precisionVSAvoidcaustic fluid creep

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

A protective coating is applied to the substrate before applying the caustic fluid. This preliminary protective layer prevents the caustic fluid from creeping and eroding the metal in areas where the image should be fine and precise, allowing the caustic to only affect areas where the protective coating is removed or absent

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If a coating is printed on the metalized film substrate before floodcoating with caustic fluid, then creep is reduced, but the coating is not removable and causes delamination problems

Engineering Contradiction:

Improvecreep reductionVSAvoidlamination reliability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The protective coating is formulated with specific chemical properties that allow it to be removed after serving its protective function. The coating contains a remover solution that can chemically break down and eliminate the protective layer, preventing delamination issues while maintaining creep protection during the demetalization process

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If a non-removable coating is used to protect against creep, then fine image detail is preserved, but the coating creates delamination problems when laminating to other materials

Engineering Contradiction:

Improvefine image detailVSAvoidcoating removal complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The protective coating is designed with removable properties through specific chemical formulation. A remover solution can be applied to chemically break down and eliminate the protective coating after it has served its purpose during demetalization, allowing the substrate to be laminated or packaged without delamination issues

Inventive Principle:

Principle #35Parameter changes

4Manufacturing precision

If a protective coating is applied to prevent caustic creep, then image precision is improved, but residual coating may contaminate food or fragrance packaging

Engineering Contradiction:

Improveimage precisionVSAvoidchemical contamination

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The protective coating is formulated to be completely removable by a specific remover solution. After the demetalization process is complete, the remover solution is applied to chemically break down and eliminate all traces of the protective coating, ensuring no residual chemicals remain that could contaminate food or fragrance packaging

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The protective coating serves as a temporary, disposable element that is applied for the duration of the demetalization process and then completely removed. It performs its protective function only during the critical demetalization step and is then eliminated, leaving no permanent residue on the substrate

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables the production of fine detailed images on metalized substrates without 'creep' issues and delamination problems, suitable for various applications including food packaging and lamination, with no residual UV-based ink or chemical contamination.

Implementation Method 1

curing the protective coating

Methodology Applied

Scientific EffectPhotopolymerisation: Photopolymerisation

Implementation Method 2

applying a demetalizing solution onto the metalized substrate

Methodology Applied

Scientific EffectChemical dissolution: Solvation

Data Source

PatentUS8628679B2High-definition demetalization process

Publication Date: 2014.01.14 PHOENIX INKS & COATINGS LLC

AI summary

A method of producing images on a metalized substrate is described. The metalized substrate comprises a substrate having a top side and a bottom side and a metalized coating adhered to the top side of the substrate. The method comprises the steps of printing an image onto the metalized coating by selectively applying a protective coating of the image, curing the protective coating, applying a demetalizing solution onto the metalized substrate, rinsing the metalized substrate, drying the metalized substrate, applying an adhesive coating onto the metalized substrate, and removing the adhesive coating.